RFL Communications 21 Sub-MUX Instrukcja Użytkownika Pobierz pdf (Strona 10)

RFL SMX3/40 Page 10 of 24 Issue 2.02

User Manual

07 May 2009

9. V24 ports

Four DCE ports are provided on DB9 female connectors for asynchronous data:

Circuit Pin Direction

TxD Transmit Data 3 Input

RxD Receive Data 2 Output

RTS Request to Send 7 Input

CTS Clear to Send 8 Output

DCD Data Carrier Detect 1 Output

DTR Data Terminal Ready 4 Input

DSR Data Set Ready 6 Output

RI Ring Indicator 9 Output

SG Signal Ground 5

Screen / Drain must be connected to the connector Shell

RI is permanently OFF.

DSR is ON when aggregate framing is synchronised.

DTR is ignored.

RTS turns on remote DCD and local CTS after a delay.

Transceivers are specified to ± 15kV IEC1000-4-2 air discharge ESD protection and

port connections are additionally protected by Tranzorb type arrays.

DIP switches provide configure options for each port, see section 10.

Data Channel Concatenation

SMX3/40 units co-located at one end of adjacent unsynchronised links may be

concatenated at the V24 level either through the connected equipment, or directly

using a crossed RS232 data cable.

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RFL Communications 21 Sub-MUX Instrukcja Użytkownika Strona 10